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T.P.D.M*V*2.4 Signal Controlled Junctions The performance of signal controlled junctions in comparison to other types of junction is dealt with in Section 4*2 of this Chapter and summarised in Table 4*2.10*1* For a detailed account of traffic signals, Volume 4 of this Manual is dedicated entirely to the subject and the reader is referred thereto.
T*P*D.M.V*2.4 4.5 Roundabouts 4-5.1 Introduction 4*5.1*1 Roundabouts could be considered as a specialized forms of Priority Junction. Unlike normal priority junctions, however, where major road traffic receives continuous priority, with roundabouts the flow entering the junction from all arms gives priority to vehicles already in the junction* Roundabouts are thus well suited to situations of balanced flow. Also, because right turns, and all other movements, are broken down into a left turn entry and a left turn exit, roundabouts are well suited to flows containing a high proportion of right turning vehicles. 4.5.1.2 There are three basic types of roundabout namely : Normal, Mini and Double. Other forms of roundabouts which are variants of these three basic types are Ring Junctions, Grade Separated Roundabouts and Signalized Roundabouts. 4.5*1*3 A normal roundabout can be considered as a one-way circulatory carriageway around a kerbed central island 4m or more in diameter and usually with flared approaches to allow multiple vehicle entry. 4.5*1.4 A mini roundabout consists of a one-way circulatory carriageway around a flush or slightly raised circular marking less than 4m in diameter and with or without flared approaches. 4.5.1*5 A double roundabout is a single junction with two normal or mini roundabouts either contiguous or connected by a central link road or kerbed island. 4.5.1*6 A grade separated roundabout junction is defined as one which includes a roundabout which has at least one entry road, via an interconnecting slip road, from a road at a different level. 4.5.1*7 A ring junction retains the large central island characteristic of a roundabout but the usual one-way circulation of vehicles is replaced by two-way circulation with three-arm mini roundabouts and/or traffic signals controlling the junction with each approach arm. 4.5.1.8 A signalized roundabout is a normal roundabout with traffic signals installed on one or more of the approach arms.
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§ • abc (*H#28572048 SHU ' 1999/
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Transport Planning & Design Manual
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T.P.D.M.V.2.1 - ' »1 PURPOSE 1 -1
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VOLUME1jTUNNELS Chapters 1. Introdu
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T.P.D.M.V.2.2 (Al/2001) Section Con
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T.P.D.M.V.2.2 (Al/2001) 2.1 Referen
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.1
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.1
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T.P.D.M.V.2.2 (Al/2001) Distance be
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.2
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T P.D.M.V.2.2 (Al/2001) Table 2.2.2
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T.P.D.M.V.2.2 (Al/2001) Table 2.2.2
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MINIMUM KERB TO KERB CLEARANCE MINI
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MINIMUM KERB CLEARANCE TO KERB MINI
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MINIMUM WALL TO WALL CLEARANCE MINI
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T.P.D.M.V.2.2 BUS DAIMLER FL££TUN
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T P n Twf V 7 T.P.D.M.V.2.2 (Al/20
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T.P.D.M.V.2.2 T.P.D.M.V.2.2 (Al/200
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T.P.D.M.V.2.2 (Al/2001) 2.4 Design
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T.P.D.M.V.2.2 (A 1/2001) 2.4.2 Esti
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T.P.D.M.V.2.2 2.4.3 Peak Hourly Flo
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Revised in December 2001 TRANSPORT
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T.P.D.M.V.2.3 (Al/2001) 3.7 Pedestr
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T.P.D.M.V.2.3 (Al/2001) Diagrams 3.
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T.PD.M.V.2.3 (Al/2001) 22. Providin
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T.PD.M.V.2.3 (Al/2001) 33 Road Alig
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T.P.D.M.V.2.3 (Al/2001) 33.2 Design
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T.P.D.M.V.2.3 (Al/2001) For Radii b
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T.P.D.M.V.2.3 (Al/2001) Table 3.3.4
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T.P.D.M.V.2.3 (Al/2001) (b) For 80
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T.PJD.M.V.2.3 (Al/2001) 3.3.7 Verti
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T.P.D.M.V.2.3 (Al/2001) 33.8 Climbi
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tft D.M,V. 2.J 10Q1 'Read Arrows'tr
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T,R0,H*V. 23 mOoubit contiimqys whi
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T.P.D.M.V.2.3 0 10,000 20,000 3WJQO
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T.P.D.M.V.23 (Al/2001) 3.4. The Roa
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T.P.D.M.V.2.3 (Al/2001) 3.4.2.7 The
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T.P.D.M.V.2.3 (Al/2001) 3.4.4 Widen
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TYPE A TYPE FOR LIGHT AND MEDIUM GO
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T.P.D.M.V.2.3 (Al/2001) 3.4.7 Centr
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T.PD.M.V.2.3 (Al/2001) 3.4.7.13 Isl
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T.P.D.M.V.2.3 (Al/2001) 3.4.9 Verge
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T.P.D.M.V.2.3 (Al/2001) (vi) there
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T.P.D.M.V.2.3 (Al/2001) 3.4.11 Foot
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T.P.D.M.V.2.3 (Al/2001) (vi) Advice
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T.P.D.M.V.2.3 (A1/2001) 7SO OR 1Q O
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T.RD.M.V. rwwi¥f«%i ** SE6 SEOTtQ
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T.RD.M.V, 2,3 (A1/2001) oaa, VIR6E
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T.P.D.M.V.2.3 3.5 Highway Clearance
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T.PD.M.V.2.3 (Al/2001) 3.5.2 Horizo
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T.PD.M.V.2.3 (Al/2001) 3.6.2 Locati
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T.RD.M.V.2.3 LOT BOUNDARY PRIVATE E
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T.P.D.M.V.2.3 t N X X X «. I B VIS
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T.P.D.M.V.2.3 (Al/2001) (c) (d) Nee
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T.P.D.M.V.2.3 (Al/2001) 3.7.2 At-Gr
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T.PD.M.V.2.3 (Al/2001) 3.7.3 Zebra
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T.P.D.M.V.2.3 GJVE WAY UNE o 4U «4
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T.P.D.M.V.2.3 (Al/2001) 3.7.3.11 De
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T.P.D.M.V.2.3 (Al/2001) 3.7.4.10 Th
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T.P.D.M.V.2.3 (Al/2001) 3.7.6 Uncon
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T.PD.M.V.2.3 (Al/2001) 3.7.7.7 Tabl
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T.P.D.M.V.2.3 Maitfri Cyefe Trade T
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T.P.D.M.V.2.3 (Al/2001) Table 3.7.7
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T.P.D.M.V.2.3 (Al/2001) 3.7.8 Escal
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T.P.D.M.V.2.3 (Al/2001) 3.8.2 Provi
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T.P.D.M. V.2.3 (Al/2001) 3.8.3.9 No
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T.P.D.M. V.2.3 (Al/2001) 3.9 Railin
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T.P.D.M. V.2.3 (Al/2001) 3.9.2.9 Ra
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T.P.D.M. V.2.3 (Al/2001) 3.9.3 Barr
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T.PD.M. V.2.3 (Al/2001) 3.9.3.8 The
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T.P.D.M. V.2.3 (Al/2001) 3.9.3.26 A
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T.P.D.M. V.2.3 (Al/2001) 3.9.3.36 T
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T.PD.M. V.2.3 (Al/2001) 3.9.4.9 Sin
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T.P.D.M. V.2.3 (Al/2001) 3.10.2 Roa
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T.P.D.M. V.2.3 (Al/2001) TUNNEL iim
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T.P.D.M. V.2.3 (Al/2001) 3.11 Singl
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T.P.D.M. V.2.3 (Al/2001) 3.11.4 Hor
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T.P.D.M. V.2.3 (Al/2001) 3.11.7 Min
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T.P.D.M. V.2.3 (Al/2001) 3.1 L9 Pas
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Revised in December 2001 TRANSPORT
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T.P.D.M.V.2.4 4.5.13 Roundabout Exi
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T.P.D.M.V.2.4 4.6.9.5 Diverging Lan
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T.P.D.M.V.2.4 4.2 Junction Design -
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T.P.D.M.V.2.4 (Al/2001) Mrnor Road
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Page 182 and 183: T.P.D.M.V.2.4 4.2.7 Economic Consid
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Page 188 and 189: T.P.D.M.V.2.4 4.3.2 Types of Priori
Page 190 and 191: 4*3*3 Siting of Priority Junctions
Page 192 and 193: 4.3.5 Pedestrian Facilities at Prio
Page 194 and 195: T.P.DJM.V.2.4 4,3.6*6 The predictiv
Page 196 and 197: T.P.D.M*V.2.4 4.3.8 Visibility Spla
Page 198 and 199: A1/88 FOR VEHICLE WAITING TO TURN R
Page 200 and 201: T.P.O.M V.2.4. FRONT KERB FRONT KER
Page 202 and 203: T.P.D.M.V.2.4 4.3.9.4 For shadow is
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Page 206 and 207: T.P.D.M.V.2.4 ^•3*12 Traffic Isla
Page 208 and 209: T.P.D.M.V.2.4 4.3.14 Corner Badil 4
Page 210 and 211: T.P.D.M.V.2.4 4,3*16 Recommended La
Page 212 and 213: T.P.D.M.V.2.4 Diagram No. 4.3.16.8
Page 214 and 215: T*P.D*M.V.2.4 (v) For left hand spl
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Page 218 and 219: T. P.D.M V.2.4 Keep Leff sign Keep
Page 220 and 221: T. P D M V 24 Compound curve for di
Page 222 and 223: T. P. D.M V.2 4 ^ —-• — —"
Page 224 and 225: T. P.D.M.V 24 1:20 taper RIGHT/LEFT
Page 226 and 227: T. P.D.M.V.2.4 1*25 taper 1 Diagram
Page 228: T P D M V 24 125 taper •UphiU gra
Page 234 and 235: 4.5.2 Normal Roundabouts 4.5.2.1 No
Page 236 and 237: NORMAL ROUNDABOUT T.P.O.M.V. 2.4. T
Page 238 and 239: T.P.O.M.V. 2.4. CONTIGUOUS DOUBLE R
Page 240 and 241: T.P.D.M.V.2.4. TWO BRIDGE ROUNDABOU
Page 242 and 243: TP.D.M.V 2.4. STRAIGHT SECTION PROV
Page 244 and 245: T.P.D«M.V*2.4 4*5.8 Pedestrian t C
Page 246 and 247: T.P.D.M.7.2JI 4*5.9*** The predicti
Page 248 and 249: T.P.D.M.V.2.4 4.5.11 Visibility 4.5
Page 250 and 251: DESIRABLE/MINIMUM VISIBILITY DISTAN
Page 252 and 253: T.P.O.M.V. 2 .4. HALF LANE WIDTH DI
Page 254 and 255: T.RD.M.V.2.4. MINIMUM AREA OVER WHI
Page 256 and 257: T.P.D.M.V.2.4 in the entry as shown
Page 258 and 259: .P.O.M.V.2>. ENTRY DEFLECTION ACHIE
Page 260 and 261: T.P.D.M.V.2.4 4.5*13 Roundabout Exi
Page 262 and 263: T.P.D.M.V.2.4 4*5.15 Inscribed Circ
Page 264 and 265: T.P.D.M.V.2.4 4.5.16 Segregated Lef
Page 266 and 267: Note:- This is not a recommendation
Page 268 and 269: T.P.D.M.V.2.4 4.5.17 Superelevation
Page 270 and 271: (b) DIVIDING CIRCULATORY CARRIAGEWA
Page 272 and 273: T.P.DJM.V.2.4 4.5.18 Signing and Li
Page 274 and 275: T.P.B.M.7.2.4 4.6 Grade Separated J
Page 276 and 277: T.P.D.M.7.2.4 4.6.2.7 The Partial C
Page 278 and 279: 4*6*3 Siting of Grade Separated Jun
Page 280 and 281: 4,6.5 General Layout Requirements 4
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T.P.D.M.V.2.4 ^6* 7 Slip Roads 4.6.
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T.P.D.M.V.2.4 4*6.7.12 The width of
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T.P.O.M.V.2.4. FIG. A 100 EDGE LINE
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T.P.D.M.V.2.4 4.6.8.7 The method of
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T.P.D.M.V.2.4 downstream. The layou
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DIRECT ENTRY MERGING UN£ (TYPES 2
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T.P.D.H.V. 2.4 TO SUIT SITE ADDITIO
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T*P*D.M.V.2.4 4.6.9*7 The design fl
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I.P.O.M.V.2.
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T,P*D.M*V.2*4 4.6.10 Weaving Sectio
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44-
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T.P.D.M.V.2.4 APPENDIX 1 ! Calculat
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T.P.D.M.V.2.4 If right and left tur
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T.P.D.M.V.2.4 4» Applying the stre
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T.P.D.M.V.2.4 The toui parts of dmw
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T.P.D.M.V.2.4 APPENDIX 2 Calculatio
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T.P.D.M.V.2.4 D=the inscribed circl
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T.P.D.M.V.2.H (v) The vehicle proce
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T.P.D.M.V.2.4 4. Using these design
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T.P.D.M.V.2.4 APPENDIX 3 Examples o
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T*P*D*M.V.2.4 The average gradient
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Revised in March 2002 TRANSPORT PLA
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T.P.D.M. V.2.5 5.1 References 1. Ch
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T.P.D.M. V.2.5 (Al/2002) 5.3 Petrol
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T.P.D.M. V.2.5 (Al/2002) 53.2 Layou
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T.P.D.M. V.2.5 5.4 Additional Speed
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T.P.D.M. V.2.5 (Al/2002) 5.43 Road
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T.P.D.M. V.2.5 (Al/2002) (vii) With
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1 R D. M, V. 2.5 Edge of Carriagewa
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T.P.D.M. V.2.5 (Al/2002) 5.4.4 Tran
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T.P.D.M. V.2.5 (Al/2002) 5.4.5.8 Us
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T.P.D.M. V.2.5 5.4.6.11 As with rum
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T.P.D.M. V.2.5 (Al/2002) 5.5.2 Gene
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T.P.D.M. V.2.5 (Al/2002) 5.6.2 Aspe
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T.P.D.M. V.2.5 (Al/2002) 5.6.2.12 W
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T.P.D.M. V.2.5 (Al/2002) 5.6.3.3 Tr
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Revised in March 2002 TRANSPORT PLA
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T.P.DJVLV.2.6 (Al/2002) Diagrams 6.
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T.RD.M.V.2.6 (Al/2002) 6.2 Introduc
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T.RD.M.V.2.6 (Al/2002) 63 Expresswa
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T.RD.M.V.2.6 (Al/2002) 63.2 Horizon
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NOTES 1. FOR DETAILS OF ROAD STUDS
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1. FOR DETAILS OF ROAD STUDS AND MA
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T.P.D.M.V.2.6 (A1/2002) CENTRAL RES
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T.P.D.M.V.2.6 (A1/2002) •FACE OF
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10&Q BOUMQA8Y FENCE 1 38UNQARY FENC
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T.RD.M.V.2.6 (Al/2002) v) earth mou
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T.RD.M.V.2.6 (Al/2002) 6.3,4 Draina
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T.RD.M. V.2.6 (Al/2002) 63.6 Juncti
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T.P.D.M.V.2.6 (A172002) DIRECT ENTR
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MIN. LANE WIDTH 3.7m ISLAND WIDTH 2
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T.P.D.M.V.2.6 (A172002) 70 NOSE DIR
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T.P.D.M.V.2.6 (A1/2002) 130 70 NOSE
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T.RD.M.V.2.6 6.4 Permanent Signs an
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T.P.D.M.V.2.6 (Al/2002) i l FOR 2 L
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T.RD.M.V.2.6 (Al/2002) 6.4.1.10 Det
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T.PD.M.V.2.6 (Al/2002) 6.4.2 Direct
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T.P.D.M.V.2.6 (Al/2002) (a) Layout
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T.P.D.M.V.2.6 (Al/2002) 6.43 Chaina
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TJP.D.M.V.2.6 (Al/2002) 6.4.4.7 In
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T.P.D.MV.2.6 (Al/2002) 6.6 Maintena
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T.P.D.M.V.2.6 (A1/2002) BEARS MINOR
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T.P.D.M.V.2.6 (Al/2002) 6.7.2.9 Whe
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T.P.D.M. V.2.6 (Al/2002) 6,8.2 Acti
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